大型的互联网项目中，返回的数据格式，有时是比较复杂的结构。 如：豆瓣电影
https://movie.douban.com/j/chart/top_list?type=24\&interval_id
=100%3A90&action=&start=20&limit=20
返回的值里有 json 或者列表数据，这时可以通过以字段来实现
fields.List 放置一个列表
fields.Nested 放置一个字典
代码实现：
# flask_restful规范返回值之类型设置
from flask import Flask
from flask_restful import Api,Resource,fields,marshal_with
app = Flask(__name__)
api = Api(app)
class User:
def __init__(self,uname):
self.uname = uname
def __repr__(self):
return f'<User uname:{self.uname}>'
class NewsType:
def __init__(self,_type):
self._type = _type
def __repr__(self):
return f'<User type:{self._type}>'
class News:
def __init__(self,code,msg):
self.code = code
self.msg = msg
self.user = None
self._type = []
def __repr__(self):
return f'<News code:{self.code} msg:{self.msg} user:{self.user} type:{self._type} >'
def create_data():
user = User('sxt')
_type1 = NewsType('IT')
_type2 = NewsType('Python')
news = News(200,'python又更新了')
news.user = user
news._type.append(_type1)
news._type.append(_type2)
return news
class NewsView(Resource):
resouce_fields = {
'code':fields.Integer,
'msg':fields.String,
'user':fields.Nested({
'uname':fields.String,
}),
'_type':fields.List(fields.Nested({
'_type':fields.String
}))
}
@marshal_with(resouce_fields)
def get(self):
news = create_data()
return news
api.add_resource(NewsView,'/news/')
if __name__=="__main__":
app.run(debug=True)
执行结果：
